<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function factorial(n) {
            // 累乘器
            var result = 1;
            for (var i = 1; i <= n; i++) {
                result *= i;
            }
            return result;
        }

        // 累加器
        var sum = 0;
        for (var i = 1; i <= 10; i++) {
            sum += factorial(i);
        }

        console.log(sum);
    </script>
</body>

</html>